(r₂ - r₁)/(r₁ - r₂)
(r₂ . r₁)/(r₂ - r₁)
(r₁ + r₂)/(r₁ . r₂)
(r₁ . r₂)/(r₁ + r₂)
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Answer : Option B
Explanation :
Explanation Not Provided
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